using MeetingAssistant.MeetingNotes;
using MeetingAssistant.Summary;

namespace MeetingAssistant.Tests;

public sealed class ProjectKnowledgeToolTests
{
    [Fact]
    public async Task ToolsOperateOnProjectsBoundInMeetingFrontmatter()
    {
        var root = Path.Combine(Path.GetTempPath(), "meeting-assistant-tests", Guid.NewGuid().ToString("N"));
        var projectsRoot = Path.Combine(root, "Projects");
        var meetingAssistantRoot = Path.Combine(projectsRoot, "MeetingAssistant");
        var ignoredRoot = Path.Combine(projectsRoot, "IgnoredProject");
        Directory.CreateDirectory(Path.Combine(meetingAssistantRoot, "notes"));
        Directory.CreateDirectory(ignoredRoot);
        await File.WriteAllTextAsync(
            Path.Combine(meetingAssistantRoot, "README.md"),
            "First line\nSecond alpha line\nThird beta line");
        await File.WriteAllTextAsync(Path.Combine(meetingAssistantRoot, "notes", "context.md"), "Project context");
        await File.WriteAllTextAsync(Path.Combine(ignoredRoot, "ignored.md"), "alpha should not be searched");

        var artifacts = CreateArtifacts(root);
        Directory.CreateDirectory(Path.GetDirectoryName(artifacts.MeetingNotePath)!);
        await File.WriteAllTextAsync(
            artifacts.MeetingNotePath,
            """
            ---
            title: Project Meeting
            attendees: []
            projects:
            - MeetingAssistant
            - MissingProject
            transcript: ""
            assistant_context: ""
            summary: ""
            ---

            User notes.
            """);
        var tools = new MeetingSummaryTools(
            artifacts,
            new MeetingAssistantOptions
            {
                Vault =
                {
                    ProjectsFolder = projectsRoot
                }
            });

        Assert.Equal("MeetingAssistant", await tools.ListProjects());
        Assert.Equal("README.md\nnotes/context.md", await tools.ListProjectFiles("MeetingAssistant"));
        Assert.Equal("Second alpha line\nThird beta line", await tools.ReadProjectFile("MeetingAssistant", "README.md", 2, 99));

        var writeResult = await tools.WriteProjectFile("MeetingAssistant", "notes/summary.md", "# Project Update");

        Assert.Equal("MeetingAssistant/notes/summary.md", writeResult);
        Assert.Equal("# Project Update", await File.ReadAllTextAsync(Path.Combine(meetingAssistantRoot, "notes", "summary.md")));
        Assert.Equal("IgnoredProject/ignored.md", await tools.WriteProjectFile("IgnoredProject", "ignored.md", "changed"));
        Assert.Equal("alpha should not be searched\nchanged", await File.ReadAllTextAsync(Path.Combine(ignoredRoot, "ignored.md")));
        Assert.Equal(
            "README.md:2 Second alpha line",
            await tools.Search("alpha"));
    }

    [Fact]
    public async Task ListProjectsAcceptsScalarProjectFrontmatter()
    {
        var root = Path.Combine(Path.GetTempPath(), "meeting-assistant-tests", Guid.NewGuid().ToString("N"));
        var projectsRoot = Path.Combine(root, "Projects");
        Directory.CreateDirectory(Path.Combine(projectsRoot, "MeetingAssistant"));
        var artifacts = CreateArtifacts(root);
        Directory.CreateDirectory(Path.GetDirectoryName(artifacts.MeetingNotePath)!);
        await File.WriteAllTextAsync(
            artifacts.MeetingNotePath,
            """
            ---
            projects: MeetingAssistant
            ---
            """);
        var tools = new MeetingSummaryTools(
            artifacts,
            new MeetingAssistantOptions
            {
                Vault =
                {
                    ProjectsFolder = projectsRoot
                }
            });

        Assert.Equal("MeetingAssistant", await tools.ListProjects());
    }

    [Fact]
    public async Task WriteProjectFileSupportsAppendReplaceInsertOverwriteAndCreate()
    {
        var root = Path.Combine(Path.GetTempPath(), "meeting-assistant-tests", Guid.NewGuid().ToString("N"));
        var projectsRoot = Path.Combine(root, "Projects");
        var projectRoot = Path.Combine(projectsRoot, "MeetingAssistant");
        Directory.CreateDirectory(projectRoot);
        var projectFile = Path.Combine(projectRoot, "notes.md");
        await File.WriteAllTextAsync(projectFile, "one\ntwo\nthree\nfour");
        var tools = new MeetingSummaryTools(
            CreateArtifacts(root),
            new MeetingAssistantOptions
            {
                Vault =
                {
                    ProjectsFolder = projectsRoot
                }
            });

        await tools.WriteProjectFile("MeetingAssistant", "notes.md", "TWO\nTHREE", from: 2, to: 3);
        Assert.Equal("one\nTWO\nTHREE\nfour", await File.ReadAllTextAsync(projectFile));

        await tools.WriteProjectFile("MeetingAssistant", "notes.md", "inserted", insert: 2);
        Assert.Equal("one\ninserted\nTWO\nTHREE\nfour", await File.ReadAllTextAsync(projectFile));

        await tools.WriteProjectFile("MeetingAssistant", "notes.md", "appended");
        Assert.Equal("one\ninserted\nTWO\nTHREE\nfour\nappended", await File.ReadAllTextAsync(projectFile));

        await tools.WriteProjectFile("MeetingAssistant", "notes.md", "replacement", replace_file: true);
        Assert.Equal("replacement", await File.ReadAllTextAsync(projectFile));

        await tools.WriteProjectFile("MeetingAssistant", "created/new.md", "created content");
        Assert.Equal("created content", await File.ReadAllTextAsync(Path.Combine(projectRoot, "created", "new.md")));
    }

    [Fact]
    public async Task WriteProjectFileRefusesMissingProjectsEscapingPathsAndAmbiguousLineArguments()
    {
        var root = Path.Combine(Path.GetTempPath(), "meeting-assistant-tests", Guid.NewGuid().ToString("N"));
        var projectsRoot = Path.Combine(root, "Projects");
        Directory.CreateDirectory(Path.Combine(projectsRoot, "MeetingAssistant"));
        var tools = new MeetingSummaryTools(
            CreateArtifacts(root),
            new MeetingAssistantOptions
            {
                Vault =
                {
                    ProjectsFolder = projectsRoot
                }
            });

        Assert.StartsWith("Refused:", await tools.WriteProjectFile("MissingProject", "notes.md", "content"));
        Assert.StartsWith("Refused:", await tools.WriteProjectFile("MeetingAssistant", "../outside.md", "content"));
        Assert.StartsWith("Refused:", await tools.WriteProjectFile("MeetingAssistant", "notes.md", "content", from: 1));
        Assert.StartsWith("Refused:", await tools.WriteProjectFile("MeetingAssistant", "notes.md", "content", from: 1, to: 1, insert: 1));
        Assert.StartsWith("Refused:", await tools.WriteProjectFile("MeetingAssistant", "notes.md", "content", from: 1, to: 1, replace_file: true));
    }

    [Fact]
    public async Task SearchCanBeLimitedByProjectFilePattern()
    {
        var root = Path.Combine(Path.GetTempPath(), "meeting-assistant-tests", Guid.NewGuid().ToString("N"));
        var projectsRoot = Path.Combine(root, "Projects");
        var projectRoot = Path.Combine(projectsRoot, "MeetingAssistant");
        Directory.CreateDirectory(projectRoot);
        await File.WriteAllTextAsync(Path.Combine(projectRoot, "PROJECT.md"), "durable needle");
        await File.WriteAllTextAsync(Path.Combine(projectRoot, "scratch.txt"), "scratch needle");
        var artifacts = CreateArtifacts(root);
        Directory.CreateDirectory(Path.GetDirectoryName(artifacts.MeetingNotePath)!);
        await File.WriteAllTextAsync(
            artifacts.MeetingNotePath,
            """
            ---
            projects:
            - MeetingAssistant
            ---
            """);
        var tools = new MeetingSummaryTools(
            artifacts,
            new MeetingAssistantOptions
            {
                Vault =
                {
                    ProjectsFolder = projectsRoot
                }
            });

        var search = await tools.Search("needle", file_pattern: "*.md");

        Assert.Contains("PROJECT.md:1 durable needle", search);
        Assert.DoesNotContain("scratch.txt", search);
    }

    private static MeetingSessionArtifacts CreateArtifacts(string root)
    {
        return new MeetingSessionArtifacts(
            MeetingNotePath: Path.Combine(root, "Meetings", "Notes", "meeting.md"),
            TranscriptPath: Path.Combine(root, "Meetings", "Transcripts", "transcript.md"),
            AssistantContextPath: Path.Combine(root, "Meetings", "Assistant Context", "context.md"),
            SummaryPath: Path.Combine(root, "Meetings", "Summaries", "summary.md"));
    }
}